L-Theanine
L-Theanine, an amino acid found in tea, has long been associated with relaxation and improved concentration. Some research has also confirmed improvements in stress response and mood. Unilever researchers uncovered more about how the body absorbs L-Theanine and its positive effects on the brain. Study participants consumed one of three different L-Theanine-containing liquids, including one biosynthetic sample. Researchers observed rapid absorption of L-Theanine into the bloodstream, regardless of the source, whether it was tea or an aqueous solution. Additionally, they detected fast rate of elimination from systemic circulation. The length of time and levels of L-Theanine in the blood were dose dependant. It was noted that previous studies have shown L-Theanine to produce attention and relaxation benefits in timeframes ranging from 30 minutes to two hours after consumption. This study will allow researchers to make further determinations regarding peak concentrations, and open the door to further study of L-Theanine. The study was funded and conducted by Unilever, which manufactures products containing L-Theanine.
Source: Nutr Neurosci. 2008 Aug 11(4): 193-8.
For more information:
http://www.ncbi.nlm.nih.gov/pubmed/18681988
L-Theanine, an amino acid found in tea, has long been associated with relaxation and improved concentration. Some research has also confirmed improvements in stress response and mood. Unilever researchers uncovered more about how the body absorbs L-Theanine and its positive effects on the brain. Study participants consumed one of three different L-Theanine-containing liquids, including one biosynthetic sample. Researchers observed rapid absorption of L-Theanine into the bloodstream, regardless of the source, whether it was tea or an aqueous solution. Additionally, they detected fast rate of elimination from systemic circulation. The length of time and levels of L-Theanine in the blood were dose dependant. It was noted that previous studies have shown L-Theanine to produce attention and relaxation benefits in timeframes ranging from 30 minutes to two hours after consumption. This study will allow researchers to make further determinations regarding peak concentrations, and open the door to further study of L-Theanine. The study was funded and conducted by Unilever, which manufactures products containing L-Theanine.
Source: Nutr Neurosci. 2008 Aug 11(4): 193-8.
For more information:
http://www.ncbi.nlm.nih.gov/pubmed/18681988